#contagiousness

after an infection, how long does one remain contagious?

The Omicron variant is spreading at full speed. It is extremely contagious. By the very admission of the Minister of Health Olivier Veran, ” traditional measurements have no real impact on Omicron “. In this context, it is important for everyone to know when they are contagious and for how long, to protect those around them. You will also be interested [EN VIDÉO] Are we protected against Covid…

Health authorities in Israel produced this public service message to demonstrate how COVID-19 is transmitted from one person to many others.

I don’t speak Hebrew, but the message is clear and memorable to anybody who sees the PSA.

Pertussis vaccine is ~75% effective, lasts only 1-2 years, does not prevent the vaccinated from acquiring the infection and passing it on, only lessens symptoms. “Herd immunity”  doesn’t apply.

Whooping cough resurgence due to vaccinated people not knowing they are infectious?

Whooping cough has made an astonishing comeback, with 2012 seeing nearly 50,000 infections in the U.S. (the most since 1955), and a death rate in infants three times that of the rest of the population. The dramatic resurgence has puzzled public health officials, who have pointed to the waning effectiveness of the current vaccine and growing anti-vaccine sentiment as the most likely culprits.                                

But that might not be the whole story, suggests a new study published in BMC Medicine by Santa Fe Institute Omidyar Fellows Ben Althouse and Sam Scarpino. Their research points to a different, but related, source of the outbreak—vaccinated people who are infectious but who do not display the symptoms of whooping cough, suggesting that the number of people transmitting without symptoms may be many times greater than those transmitting with symptoms.